root/arch/x86/crypto/twofish-avx-x86_64-asm_64.S

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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Twofish Cipher 8-way parallel algorithm (AVX/x86_64)
   4  *
   5  * Copyright (C) 2012 Johannes Goetzfried
   6  *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
   7  *
   8  * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
   9  */
  10 
  11 #include <linux/linkage.h>
  12 #include <asm/frame.h>
  13 #include "glue_helper-asm-avx.S"
  14 
  15 .file "twofish-avx-x86_64-asm_64.S"
  16 
  17 .section        .rodata.cst16.bswap128_mask, "aM", @progbits, 16
  18 .align 16
  19 .Lbswap128_mask:
  20         .byte 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
  21 
  22 .section        .rodata.cst16.xts_gf128mul_and_shl1_mask, "aM", @progbits, 16
  23 .align 16
  24 .Lxts_gf128mul_and_shl1_mask:
  25         .byte 0x87, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0
  26 
  27 .text
  28 
  29 /* structure of crypto context */
  30 #define s0      0
  31 #define s1      1024
  32 #define s2      2048
  33 #define s3      3072
  34 #define w       4096
  35 #define k       4128
  36 
  37 /**********************************************************************
  38   8-way AVX twofish
  39  **********************************************************************/
  40 #define CTX %rdi
  41 
  42 #define RA1 %xmm0
  43 #define RB1 %xmm1
  44 #define RC1 %xmm2
  45 #define RD1 %xmm3
  46 
  47 #define RA2 %xmm4
  48 #define RB2 %xmm5
  49 #define RC2 %xmm6
  50 #define RD2 %xmm7
  51 
  52 #define RX0 %xmm8
  53 #define RY0 %xmm9
  54 
  55 #define RX1 %xmm10
  56 #define RY1 %xmm11
  57 
  58 #define RK1 %xmm12
  59 #define RK2 %xmm13
  60 
  61 #define RT %xmm14
  62 #define RR %xmm15
  63 
  64 #define RID1  %r13
  65 #define RID1d %r13d
  66 #define RID2  %rsi
  67 #define RID2d %esi
  68 
  69 #define RGI1   %rdx
  70 #define RGI1bl %dl
  71 #define RGI1bh %dh
  72 #define RGI2   %rcx
  73 #define RGI2bl %cl
  74 #define RGI2bh %ch
  75 
  76 #define RGI3   %rax
  77 #define RGI3bl %al
  78 #define RGI3bh %ah
  79 #define RGI4   %rbx
  80 #define RGI4bl %bl
  81 #define RGI4bh %bh
  82 
  83 #define RGS1  %r8
  84 #define RGS1d %r8d
  85 #define RGS2  %r9
  86 #define RGS2d %r9d
  87 #define RGS3  %r10
  88 #define RGS3d %r10d
  89 
  90 
  91 #define lookup_32bit(t0, t1, t2, t3, src, dst, interleave_op, il_reg) \
  92         movzbl          src ## bl,        RID1d;     \
  93         movzbl          src ## bh,        RID2d;     \
  94         shrq $16,       src;                         \
  95         movl            t0(CTX, RID1, 4), dst ## d;  \
  96         movl            t1(CTX, RID2, 4), RID2d;     \
  97         movzbl          src ## bl,        RID1d;     \
  98         xorl            RID2d,            dst ## d;  \
  99         movzbl          src ## bh,        RID2d;     \
 100         interleave_op(il_reg);                       \
 101         xorl            t2(CTX, RID1, 4), dst ## d;  \
 102         xorl            t3(CTX, RID2, 4), dst ## d;
 103 
 104 #define dummy(d) /* do nothing */
 105 
 106 #define shr_next(reg) \
 107         shrq $16,       reg;
 108 
 109 #define G(gi1, gi2, x, t0, t1, t2, t3) \
 110         lookup_32bit(t0, t1, t2, t3, ##gi1, RGS1, shr_next, ##gi1);  \
 111         lookup_32bit(t0, t1, t2, t3, ##gi2, RGS3, shr_next, ##gi2);  \
 112         \
 113         lookup_32bit(t0, t1, t2, t3, ##gi1, RGS2, dummy, none);      \
 114         shlq $32,       RGS2;                                        \
 115         orq             RGS1, RGS2;                                  \
 116         lookup_32bit(t0, t1, t2, t3, ##gi2, RGS1, dummy, none);      \
 117         shlq $32,       RGS1;                                        \
 118         orq             RGS1, RGS3;
 119 
 120 #define round_head_2(a, b, x1, y1, x2, y2) \
 121         vmovq           b ## 1, RGI3;           \
 122         vpextrq $1,     b ## 1, RGI4;           \
 123         \
 124         G(RGI1, RGI2, x1, s0, s1, s2, s3);      \
 125         vmovq           a ## 2, RGI1;           \
 126         vpextrq $1,     a ## 2, RGI2;           \
 127         vmovq           RGS2, x1;               \
 128         vpinsrq $1,     RGS3, x1, x1;           \
 129         \
 130         G(RGI3, RGI4, y1, s1, s2, s3, s0);      \
 131         vmovq           b ## 2, RGI3;           \
 132         vpextrq $1,     b ## 2, RGI4;           \
 133         vmovq           RGS2, y1;               \
 134         vpinsrq $1,     RGS3, y1, y1;           \
 135         \
 136         G(RGI1, RGI2, x2, s0, s1, s2, s3);      \
 137         vmovq           RGS2, x2;               \
 138         vpinsrq $1,     RGS3, x2, x2;           \
 139         \
 140         G(RGI3, RGI4, y2, s1, s2, s3, s0);      \
 141         vmovq           RGS2, y2;               \
 142         vpinsrq $1,     RGS3, y2, y2;
 143 
 144 #define encround_tail(a, b, c, d, x, y, prerotate) \
 145         vpaddd                  x, y,   x; \
 146         vpaddd                  x, RK1, RT;\
 147         prerotate(b);                      \
 148         vpxor                   RT, c,  c; \
 149         vpaddd                  y, x,   y; \
 150         vpaddd                  y, RK2, y; \
 151         vpsrld $1,              c, RT;     \
 152         vpslld $(32 - 1),       c, c;      \
 153         vpor                    c, RT,  c; \
 154         vpxor                   d, y,   d; \
 155 
 156 #define decround_tail(a, b, c, d, x, y, prerotate) \
 157         vpaddd                  x, y,   x; \
 158         vpaddd                  x, RK1, RT;\
 159         prerotate(a);                      \
 160         vpxor                   RT, c,  c; \
 161         vpaddd                  y, x,   y; \
 162         vpaddd                  y, RK2, y; \
 163         vpxor                   d, y,   d; \
 164         vpsrld $1,              d, y;      \
 165         vpslld $(32 - 1),       d, d;      \
 166         vpor                    d, y,   d; \
 167 
 168 #define rotate_1l(x) \
 169         vpslld $1,              x, RR;     \
 170         vpsrld $(32 - 1),       x, x;      \
 171         vpor                    x, RR,  x;
 172 
 173 #define preload_rgi(c) \
 174         vmovq                   c, RGI1; \
 175         vpextrq $1,             c, RGI2;
 176 
 177 #define encrypt_round(n, a, b, c, d, preload, prerotate) \
 178         vbroadcastss (k+4*(2*(n)))(CTX),   RK1;                  \
 179         vbroadcastss (k+4*(2*(n)+1))(CTX), RK2;                  \
 180         round_head_2(a, b, RX0, RY0, RX1, RY1);                  \
 181         encround_tail(a ## 1, b ## 1, c ## 1, d ## 1, RX0, RY0, prerotate); \
 182         preload(c ## 1);                                         \
 183         encround_tail(a ## 2, b ## 2, c ## 2, d ## 2, RX1, RY1, prerotate);
 184 
 185 #define decrypt_round(n, a, b, c, d, preload, prerotate) \
 186         vbroadcastss (k+4*(2*(n)))(CTX),   RK1;                  \
 187         vbroadcastss (k+4*(2*(n)+1))(CTX), RK2;                  \
 188         round_head_2(a, b, RX0, RY0, RX1, RY1);                  \
 189         decround_tail(a ## 1, b ## 1, c ## 1, d ## 1, RX0, RY0, prerotate); \
 190         preload(c ## 1);                                         \
 191         decround_tail(a ## 2, b ## 2, c ## 2, d ## 2, RX1, RY1, prerotate);
 192 
 193 #define encrypt_cycle(n) \
 194         encrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l); \
 195         encrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l);
 196 
 197 #define encrypt_cycle_last(n) \
 198         encrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l); \
 199         encrypt_round(((2*n) + 1), RC, RD, RA, RB, dummy, dummy);
 200 
 201 #define decrypt_cycle(n) \
 202         decrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l); \
 203         decrypt_round((2*n), RA, RB, RC, RD, preload_rgi, rotate_1l);
 204 
 205 #define decrypt_cycle_last(n) \
 206         decrypt_round(((2*n) + 1), RC, RD, RA, RB, preload_rgi, rotate_1l); \
 207         decrypt_round((2*n), RA, RB, RC, RD, dummy, dummy);
 208 
 209 #define transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
 210         vpunpckldq              x1, x0, t0; \
 211         vpunpckhdq              x1, x0, t2; \
 212         vpunpckldq              x3, x2, t1; \
 213         vpunpckhdq              x3, x2, x3; \
 214         \
 215         vpunpcklqdq             t1, t0, x0; \
 216         vpunpckhqdq             t1, t0, x1; \
 217         vpunpcklqdq             x3, t2, x2; \
 218         vpunpckhqdq             x3, t2, x3;
 219 
 220 #define inpack_blocks(x0, x1, x2, x3, wkey, t0, t1, t2) \
 221         vpxor           x0, wkey, x0; \
 222         vpxor           x1, wkey, x1; \
 223         vpxor           x2, wkey, x2; \
 224         vpxor           x3, wkey, x3; \
 225         \
 226         transpose_4x4(x0, x1, x2, x3, t0, t1, t2)
 227 
 228 #define outunpack_blocks(x0, x1, x2, x3, wkey, t0, t1, t2) \
 229         transpose_4x4(x0, x1, x2, x3, t0, t1, t2) \
 230         \
 231         vpxor           x0, wkey, x0; \
 232         vpxor           x1, wkey, x1; \
 233         vpxor           x2, wkey, x2; \
 234         vpxor           x3, wkey, x3;
 235 
 236 .align 8
 237 __twofish_enc_blk8:
 238         /* input:
 239          *      %rdi: ctx, CTX
 240          *      RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: blocks
 241          * output:
 242          *      RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2: encrypted blocks
 243          */
 244 
 245         vmovdqu w(CTX), RK1;
 246 
 247         pushq %r13;
 248         pushq %rbx;
 249         pushq %rcx;
 250 
 251         inpack_blocks(RA1, RB1, RC1, RD1, RK1, RX0, RY0, RK2);
 252         preload_rgi(RA1);
 253         rotate_1l(RD1);
 254         inpack_blocks(RA2, RB2, RC2, RD2, RK1, RX0, RY0, RK2);
 255         rotate_1l(RD2);
 256 
 257         encrypt_cycle(0);
 258         encrypt_cycle(1);
 259         encrypt_cycle(2);
 260         encrypt_cycle(3);
 261         encrypt_cycle(4);
 262         encrypt_cycle(5);
 263         encrypt_cycle(6);
 264         encrypt_cycle_last(7);
 265 
 266         vmovdqu (w+4*4)(CTX), RK1;
 267 
 268         popq %rcx;
 269         popq %rbx;
 270         popq %r13;
 271 
 272         outunpack_blocks(RC1, RD1, RA1, RB1, RK1, RX0, RY0, RK2);
 273         outunpack_blocks(RC2, RD2, RA2, RB2, RK1, RX0, RY0, RK2);
 274 
 275         ret;
 276 ENDPROC(__twofish_enc_blk8)
 277 
 278 .align 8
 279 __twofish_dec_blk8:
 280         /* input:
 281          *      %rdi: ctx, CTX
 282          *      RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2: encrypted blocks
 283          * output:
 284          *      RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2: decrypted blocks
 285          */
 286 
 287         vmovdqu (w+4*4)(CTX), RK1;
 288 
 289         pushq %r13;
 290         pushq %rbx;
 291 
 292         inpack_blocks(RC1, RD1, RA1, RB1, RK1, RX0, RY0, RK2);
 293         preload_rgi(RC1);
 294         rotate_1l(RA1);
 295         inpack_blocks(RC2, RD2, RA2, RB2, RK1, RX0, RY0, RK2);
 296         rotate_1l(RA2);
 297 
 298         decrypt_cycle(7);
 299         decrypt_cycle(6);
 300         decrypt_cycle(5);
 301         decrypt_cycle(4);
 302         decrypt_cycle(3);
 303         decrypt_cycle(2);
 304         decrypt_cycle(1);
 305         decrypt_cycle_last(0);
 306 
 307         vmovdqu (w)(CTX), RK1;
 308 
 309         popq %rbx;
 310         popq %r13;
 311 
 312         outunpack_blocks(RA1, RB1, RC1, RD1, RK1, RX0, RY0, RK2);
 313         outunpack_blocks(RA2, RB2, RC2, RD2, RK1, RX0, RY0, RK2);
 314 
 315         ret;
 316 ENDPROC(__twofish_dec_blk8)
 317 
 318 ENTRY(twofish_ecb_enc_8way)
 319         /* input:
 320          *      %rdi: ctx, CTX
 321          *      %rsi: dst
 322          *      %rdx: src
 323          */
 324         FRAME_BEGIN
 325 
 326         movq %rsi, %r11;
 327 
 328         load_8way(%rdx, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
 329 
 330         call __twofish_enc_blk8;
 331 
 332         store_8way(%r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
 333 
 334         FRAME_END
 335         ret;
 336 ENDPROC(twofish_ecb_enc_8way)
 337 
 338 ENTRY(twofish_ecb_dec_8way)
 339         /* input:
 340          *      %rdi: ctx, CTX
 341          *      %rsi: dst
 342          *      %rdx: src
 343          */
 344         FRAME_BEGIN
 345 
 346         movq %rsi, %r11;
 347 
 348         load_8way(%rdx, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
 349 
 350         call __twofish_dec_blk8;
 351 
 352         store_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
 353 
 354         FRAME_END
 355         ret;
 356 ENDPROC(twofish_ecb_dec_8way)
 357 
 358 ENTRY(twofish_cbc_dec_8way)
 359         /* input:
 360          *      %rdi: ctx, CTX
 361          *      %rsi: dst
 362          *      %rdx: src
 363          */
 364         FRAME_BEGIN
 365 
 366         pushq %r12;
 367 
 368         movq %rsi, %r11;
 369         movq %rdx, %r12;
 370 
 371         load_8way(%rdx, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
 372 
 373         call __twofish_dec_blk8;
 374 
 375         store_cbc_8way(%r12, %r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
 376 
 377         popq %r12;
 378 
 379         FRAME_END
 380         ret;
 381 ENDPROC(twofish_cbc_dec_8way)
 382 
 383 ENTRY(twofish_ctr_8way)
 384         /* input:
 385          *      %rdi: ctx, CTX
 386          *      %rsi: dst
 387          *      %rdx: src
 388          *      %rcx: iv (little endian, 128bit)
 389          */
 390         FRAME_BEGIN
 391 
 392         pushq %r12;
 393 
 394         movq %rsi, %r11;
 395         movq %rdx, %r12;
 396 
 397         load_ctr_8way(%rcx, .Lbswap128_mask, RA1, RB1, RC1, RD1, RA2, RB2, RC2,
 398                       RD2, RX0, RX1, RY0);
 399 
 400         call __twofish_enc_blk8;
 401 
 402         store_ctr_8way(%r12, %r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
 403 
 404         popq %r12;
 405 
 406         FRAME_END
 407         ret;
 408 ENDPROC(twofish_ctr_8way)
 409 
 410 ENTRY(twofish_xts_enc_8way)
 411         /* input:
 412          *      %rdi: ctx, CTX
 413          *      %rsi: dst
 414          *      %rdx: src
 415          *      %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
 416          */
 417         FRAME_BEGIN
 418 
 419         movq %rsi, %r11;
 420 
 421         /* regs <= src, dst <= IVs, regs <= regs xor IVs */
 422         load_xts_8way(%rcx, %rdx, %rsi, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2,
 423                       RX0, RX1, RY0, .Lxts_gf128mul_and_shl1_mask);
 424 
 425         call __twofish_enc_blk8;
 426 
 427         /* dst <= regs xor IVs(in dst) */
 428         store_xts_8way(%r11, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2);
 429 
 430         FRAME_END
 431         ret;
 432 ENDPROC(twofish_xts_enc_8way)
 433 
 434 ENTRY(twofish_xts_dec_8way)
 435         /* input:
 436          *      %rdi: ctx, CTX
 437          *      %rsi: dst
 438          *      %rdx: src
 439          *      %rcx: iv (t ⊕ αⁿ ∈ GF(2¹²⁸))
 440          */
 441         FRAME_BEGIN
 442 
 443         movq %rsi, %r11;
 444 
 445         /* regs <= src, dst <= IVs, regs <= regs xor IVs */
 446         load_xts_8way(%rcx, %rdx, %rsi, RC1, RD1, RA1, RB1, RC2, RD2, RA2, RB2,
 447                       RX0, RX1, RY0, .Lxts_gf128mul_and_shl1_mask);
 448 
 449         call __twofish_dec_blk8;
 450 
 451         /* dst <= regs xor IVs(in dst) */
 452         store_xts_8way(%r11, RA1, RB1, RC1, RD1, RA2, RB2, RC2, RD2);
 453 
 454         FRAME_END
 455         ret;
 456 ENDPROC(twofish_xts_dec_8way)

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